Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d60f4ba7c27c970333faf2714ba107b9c4287dd09886d1f0b6c957a01a521af' 
  AND token = 'aiUjF9U5g8ErTu5iN6xjIvb/rWQKfc1O6ZZjPVZkBzI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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