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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88d74f0dfb63c7f8eaeea685f58ca6a47c7699a45d2f4cddbd3aedb19de8baf1' 
  AND token = 'FqzL2LaZ9ltl6VURwi/OIAYklf4te4EVRhjN4RMJ6PE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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