SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4c9399e01252b2878738a63dc0ea8cee41ce5a9122fed0cda751fd5ba8d3ea5' 
  AND token = 'VlM6wtQvPOTGDKSmKztrgTfA25msYwyrj+gjWzIcgJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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