Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '02707dfa1fa00c4e6d6bccb7ff29fafba7f0b17ae0f9ea0c64548ae8cda7114d' 
  AND token = 'oZFLEY2Sh1fKNaevYGcYh0waYKv6oVTPUPyNxJ0oO5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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