Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0174bcb2b04f3b8ce450e79821fe624fbd60b165525a272fa1e2aaad69b80ee4' 
  AND token = 'nMDJUVMPU8aGXgcjMdQCL4o31O/+anjH0Q/Ei2iiFk0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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