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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dee4122c66e92b65eaf94c10b8fb959b69ee74c7f872734d32fc1db644386f93' 
  AND token = 'Cz3HG2ee1E01bfDtALt9AnLXMeME+KMOFLEbYEh9me4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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