Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0d3f68ef79c606db4fa02a7fb1bd0fa96987d7744677b3e0e341e8698f418ce' 
  AND token = 'QL5NqMZSm0OjWg4tUzWQWDkPVNiRii86RR4WFDMWHLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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