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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee910587d5ed3b18aaf0e5ed8678c8296ba636bd4e2774df21d994ab18955e5d' 
  AND token = 'tqYT4EyRM7epqRe92c6Knez266MK0Jq9Q1yeC4C1KuA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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