Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbe47fa80c94b786ec89959eb311f427fdb4537f46f3cacc864ed93688fbb8e8' 
  AND token = 'S5WvLKwZ3a7zJI3Qvbu08rJ3Jf3At2iMvTprotDe1ew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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