SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12e56cb902f8f7b4653cf604337ccb9e5e643215963aca036ae0efb7a48d3e70' 
  AND token = 'nrZOg+qgQEEjZGYEZC4PjJ7G/ljheAvpXLqSUaavXPk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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