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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '39a876bcf8caf07a2760ee17229ff846e363dce0de0d4ceb16aa8a8f6a283a53' 
  AND token = 'ji0Luwhf3h528yx/rLPG0AYE1Pc9n0JESq64/M9lrrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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