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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ec37a64b48c1f91227ab7ae6bd497c75ca4860838d77e4668b4a39ac2b265b9' 
  AND token = 'ufdZdHfaHLT393kjbZR8T6Rpz8JnsAu7d6WLqmmnfMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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