SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f496157c38309bfa776479f56880725564c8316f420c0dc4afa0051b8f599983' 
  AND token = 'uPe7bne4ojA8CamME6q5sy/KkvVGSUFniuQJzZv4x1U=' 
  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"
    }
  }
}