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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c84d5d04b722e13d70251a4c26c5dca9ae16defbad0fc488d44d696270723a31' 
  AND token = '8M4sfQFhSMZZv1OjO24E/2fMwd6Q4UYNmW5V6V0dgKk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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