SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20f0f02cd4d489ac72892f5aa572d1647e72a2e8279866a3808fe8164136e45c' 
  AND token = 'HZ+zZDLfq7l1lnS4ol8y+aUHR/jm0Mj+JuXUvikwgtg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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