Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36b72e955fba00773e2f62d104818ec1ecc56dc33d6c11ba6adc1c84dfbe1953' 
  AND token = 'TfFdVyXD4onNInl7CdFKImqs60irrEnJp6SqeEGJWLo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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