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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e0d58dbf4b0b31f0c40bfc3183ea75500ba54b0b23aa85c72e067a40c6c9380e' 
  AND token = '3UPpmmjAxSrU6NSM1jrY2yyR1TiMW87dDA0FN8Zwo9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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