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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab1ea86524bf0de2dd8b5dec65f63293d592f70d48bc576e7434256d39c06939' 
  AND token = 'UwBNHb/SiateTw7pl/C/XmZI9HvxoNVt/uRmE5fcbuQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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