SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07e7edccb86f0d6bd571b39fba78c7d8fbc682710ea93cfb380cab6694a131a1' 
  AND token = 'YX34FaKJFchSlX2gqg55lhKiA5mvSvuDILR3hy/gvUs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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