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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01ea7a0cf5dd0f6403225ab7ec6d55f25824afc8280c9fa8e594fe04e0033fb7' 
  AND token = '5srOJEr8+ysyOUESda561eqLDI38YP17xg6pIJAS3Gc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}