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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22a59a475ffcc986dfd23009a6aaee3c900b2dd17a365ecd28dfc654230abc34' 
  AND token = '+9ToEewgR+WZjMWOPetb8V6XNAYljYGiJmtoOOI9Dko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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