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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '69ba48a1ced029cbf62718faab77a5265899f246a1cbe58484c9551e154cd2db' 
  AND token = 'kRMKyoS7/M17FiM4R/H5AXMrHvGJxMUqljvA8Ll77nA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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