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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ecaef4625ed2686aead7e86d61234457acbc2b4cad19299697ec3e09dea9a59f' 
  AND token = 'dsdvd8yKcxtjyE9Li44oKR+kKrgR9DS64tASl/GdV7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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