Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fb373e7f5e4b1f1aa76504ae0cbf15155442945e7eb8e69529bec6d617feb9f3' 
  AND token = 'fYdwlmaQDqNiFOkob22KDwA0e+LuAOSIOrxYqwriusY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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