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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01ac2543242ec1f26f0e0e47bbcd59dc0ae3c639ea28c550b7306dda1e77c956' 
  AND token = 'TFLX5cv0voHJBDNl7/kF7SEqdjvtN3VEtZ4C/IJ6lBo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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