Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa64fcc26ae417ecc81b9b63eafba83bfb46611f59350eef7f62b25a841ea975' 
  AND token = 'X4UonMeHaQ8osMJG283A+JfF61jsUGuR8RSDNO16nAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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