SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f61155666e0a38ca1361d68c7f7a9ab9bb9f27f0efb11470b78c46c03161f2c3' 
  AND token = '342tJt/aS0tB+VG4kZO3RK8aVNZ+Zpc11zoDMYnKXvo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}