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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa3fc03d86203b6b3ce0e94e945f5aa60abfe9c71656f7bd78361dbf23225ded' 
  AND token = 'bzvQ3K7Nikk2y2/SmqX21+ZUU74k/72AulCL7y2g8DI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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