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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f0a56706f55df1dbd565d09d427245db09d85dc8e65eda077a16fee69ff1175f' 
  AND token = 'Yb9aGSqtF0hKh9KmnSmF3zPXyVfehvhn1jYZpMCCFnQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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