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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '6bde70cd92b6069b82676a480162cbedd39f0c98ee6ed686706848ced146aa1d' 
  AND token = 'fD26erH/bJl7Kryv4NKfqi1znPntcgAcQ/nxDwdW6xY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}