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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3e87cae34e9f5f38dfb2ff4b6b48c89c74f3e2b660ebb078c710af6f06ef0c9' 
  AND token = 'iJvXXNThWAdeJ7W7vAsGggK02s35LLpdJSpoWlFpof0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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