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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63a0fdce1e4d9705f6dffe5395bfe8383080958471ee81621b111847c4ae2244' 
  AND token = '3GxRbzRJR9lfh/VnIQ0bbNh+jUx+msx3D+ER5apKH2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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