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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'a1660dd71dd4120eca4fa44f386fa925d9e66d164b3e39e08081a12ed6356013' 
  AND token = 'E2rV7Db3QPBBUmtZp93FXPb5gmOPpGKNnX4qabwGM00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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