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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58da2fd53eae3d6ab1959fdc7f89641dba68b069f383341dbaa970fccab07d34' 
  AND token = 'eselDdsR3NMsAk4Bx2A+uT5TG1q/sFQFy9eHjcGg2xg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}