SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d65e2f98b1413d53e1342b0d687418889b268220a8f4431bd0e580941fb8026' 
  AND token = 'V7WvhUcoY4XI+hPzM7sjJBoQgUkjcunXa2AJ/REPMx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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