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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33162a5396d367120e49bddfd86098f57a404523710fd0b2c41bf4d649bf641e' 
  AND token = 'f01T4K0F53a6dT9vyJk2Q97tZn4GQ+loA57Wr4KNUsc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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