Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53ca8dcf95078159436065b98beb64ea47b6c993ff0f0f0d624b32236f97da83' 
  AND token = 'y09bJM6H8EXRAHGdKDk13/wldzVU7fT2OidZ0e+OISQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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