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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00382a41877182c14f64bdbcf767cc52c9386e3792e3b0f047cae1eeb8535186' 
  AND token = 'wpScr3F1F4y3DSOgIPC07AXao8V8Irhelu7OGnBkgfA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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