Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36abf8d89c23c9d69aaab5fed7add7a129d2e19e664e5c550e7a63fd488b26ce' 
  AND token = 'I/Bm+jrrlIL1I1iLRA0gc+LeDHByvc5ZC4D1rgYeB9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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