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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4c4326e1a8f215f2a285cdd3752148f86a1099ff842f38ce872bd1b639235d53' 
  AND token = '27aUMoyOzhrEZ+MPpK2bYCi9geJ5DeFOVq0+Na2dkW8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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