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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '092db85480449b24047d419d9246d9ed0777a21e2f027a1baf61cf4f00316b22' 
  AND token = '1DgX2JAnHN6yKB1QAphaR7Ws7dEoExsjL7nk2n/LFyk=' 
  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"
    }
  }
}