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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '25de7ba364a2c36f82e4a0d5050dd6e0e0c5409a9340c4ad4b74fcb143d1b62c' 
  AND token = 'xDNDpnNczKO0XXIa2t3CUrZ2eKb+MI7lWvNcaPmFlHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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