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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9570d089f23bbd4e391c65fd44b0adb0203c750d90dfd5d5c76e37fa5c2f4965' 
  AND token = 'IfxLn4W7N3ReK0x9FTRup9N6GWXM+5M7ystiKgrUGdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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